Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tran » thanh trang, thanh toan, thanh tra
tran thanh » ban thanh, van thanh, quan thanh
thong cong » trong cong, tong cong, phong chong
hoc thieu » toc thieu, hoc hien
than cap » khan cap, thanh lap, thanh cac
khan ap » khan cap, han ap, khan dam

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tran thanh ((thong cong) OR (thong thong)) dan ((than cap) OR (khan ap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tran thanh ((thong cong) OR (thong thong)) dan ((than cap) or (khan ap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tran thanh ((thong cong) OR (thong thong)) dan ((than cap) or (khan ap))*.